package com.itheima.reggie.filter;

import com.alibaba.fastjson.JSON;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;

import lombok.Data;
import lombok.extern.slf4j.Slf4j;

import org.springframework.util.AntPathMatcher;


import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;


/**
 * @author chm
 * @version 1.0.0 v
 * @date 2022-08-14 1:03
 */
@WebFilter(filterName = "loginCheckFilter",urlPatterns = "/*")
@Slf4j
@Data
public class LoginCheckFilter implements Filter {

    public static final AntPathMatcher PATH_MATCHER=new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request= (HttpServletRequest) servletRequest;
        HttpServletResponse response= (HttpServletResponse) servletResponse;

        String requestURI = request.getRequestURI();

        log.info("拦截到的请求 {}",requestURI);

//过滤掉不要的目录
        String[]urls=new String[]{
              "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/common/**",
                "/user/sendMsg",
                "/usr/login",
                "/doc.html",
                "/web.jars/**",
                "/swagger-resources",
                "/v2/api-docs"
        };

//判断请求是否要处理
        boolean check =check(urls,requestURI);
        //直接放
        if (check){
            log.info("本次请求{}不处理",requestURI);
            filterChain.doFilter(request,response);
        return;
        }

        if (request.getSession().getAttribute("employee")!=null){
            log.info("用户登录的密码id {}",request.getSession().getAttribute("employee"));

            Long empId=(Long) request.getSession().getAttribute("employee");
            BaseContext.setCurrentId(empId);

           filterChain.doFilter(request,response);
            return;
        }

        if (request.getSession().getAttribute("user")!=null){
            log.info("用户登录的密码id {}",request.getSession().getAttribute("user"));

            Long userId=(Long) request.getSession().getAttribute("user");
            BaseContext.setCurrentId(userId);

            filterChain.doFilter(request,response);
            return;
        }





        log.info("用户未登录");
//像前端反映
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));


    }

    public boolean check(String[]urls,String requestURI){
        for (String url:urls){
            boolean match =PATH_MATCHER.match(url,requestURI);
            if (match){
                return true;
            }
        }
        return false;
    }



}
